Construction method for tall and large independent column of heavy industrial upstairs workshop

Abstract

The invention relates to a construction method for a tall and large independent column of a heavy industrial upstairs workshop. The construction method comprises the steps that S1, foundation strengthening treatment is conducted on a construction area beside a pier column; s2, an elevator cage is installed on the reinforced foundation, and then a stabilizing assembly used for stabilizing the elevator cage is installed; s3, reinforcing meshes of the independent columns are bound in the elevator cage in a layered mode, and anti-falling nets are arranged in the reinforcing meshes; s4, the column formwork assembly is installed, and in the installation process, the perpendicularity of the column formwork assembly is ensured through a cable rope and a tilt angle sensor; s5, concrete is poured in a segmented mode through the concrete guide pipe, and the independent column is mold.The method has the beneficial effects that it is guaranteed that the independent column has enough bearing capacity and stability through foundation strengthening treatment, high-precision formwork control and high-quality concrete pouring, the strict requirement of a high-rise industrial factory building for a core bearing structure is met, and the construction period is shortened. Reliable technical support is provided for landing of a heavy industrial upstairs mode.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a construction method for tall independent columns in heavy industrial multi-story factory buildings. Background Technology

[0002] Traditional flat-style industrial plants are gradually becoming inadequate to meet development needs due to low land utilization. In contrast, heavy industrial multi-story plants, through vertical space utilization, can support heavy production equipment and high-load operations on limited land, becoming a key path to solve the problem of land resource scarcity. At the same time, industrial upgrading is driving the transformation of traditional heavy industry towards automation and intelligence, which places higher demands on the flexibility, safety, and environmental protection of production spaces. Heavy industrial multi-story plants, through intensive layout and advanced supporting facilities, provide a suitable platform for industrial upgrading.

[0003] However, the construction of the core load-bearing structure of heavy industrial multi-story factory buildings—tall independent columns (typically exceeding 15m in height, with a single column bearing capacity of several thousand tons)—faces numerous technical challenges. Existing construction methods, such as "erecting scaffolding and erecting wooden formwork," have significant drawbacks: scaffolding erection consumes a large amount of materials such as steel pipes and fasteners, and the labor input during erection and dismantling is substantial, directly increasing construction costs; furthermore, the scaffolding needs to be erected three times along with the three-section pouring of the columns, with simultaneous column bracing, resulting in complex and interwoven procedures, extending the construction period, and severely impacting the overall construction. Progress; the high height of high-rise scaffolding makes it prone to collapse if not erected properly, and the difficulty of material transportation during high-altitude operations further increases safety hazards; the wooden formwork lacks rigidity and is prone to deformation due to lateral pressure during concrete pouring, affecting the quality of column forming; traditional methods rely on manual plumb line control of formwork verticality, which has a large error and is difficult to meet the requirements of heavy industrial multi-story buildings for "high verticality and high load-bearing capacity" of independent columns; in addition, the lack of dynamic positioning mechanism between the scaffolding and the column structure makes it easy for misalignment to occur during rebar binding, affecting the uniformity of structural stress.

[0004] Therefore, there is an urgent need for a construction method that can break through the limitations of traditional scaffolding and wooden formwork. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a construction method for tall independent columns in heavy industrial multi-story factory buildings, which solves the technical problems of high material and labor costs and unsafe construction when using existing high-rise scaffolding.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] This invention provides a construction method for tall, independent columns in heavy industrial multi-story factory buildings, comprising the following steps:

[0010] S1. Strengthen the foundation of the construction area next to the pier.

[0011] S2. Install the ladder cage on the reinforced foundation, and then install the stabilizing components for the ladder cage.

[0012] S3. Tie the steel mesh of the independent columns in layers inside the ladder cage and install the fall protection net inside the steel mesh.

[0013] S4. Install the column formwork assembly. During the installation process, the verticality of the column formwork assembly is ensured by using guy ropes and tilt sensors.

[0014] S5. Concrete is poured in sections through concrete conduits to form the independent column.

[0015] Optionally, step S1 includes:

[0016] S11. Lay the bottom layer of conductive concrete.

[0017] S12. Pour the surface concrete; the thickness of the surface concrete is 100-120mm.

[0018] S13. After the surface concrete has solidified, apply an axial static magnetic field of 0.25 to 0.35 T for 20 to 24 hours.

[0019] Optionally, the surface concrete contains 1.2% to 1.8% iron oxide particles.

[0020] Optionally, the aggregate used in the poured concrete includes magnetic aggregate and conventional aggregate; the proportion of magnetic aggregate is 28% to 32%, and the proportion of conventional aggregate is 68% to 72%.

[0021] Optionally, step S5 includes:

[0022] S51. An electromagnetic current stabilizer is installed on the outside of the concrete duct; wherein the magnetic field strength generated by the electromagnetic current stabilizer is 0.3T and the outlet flow velocity of the concrete duct is 1m / s.

[0023] S52. The height of each pouring section is 40-50cm. During the pouring process, different magnetic fields are applied in sections according to the height of the independent column: when pouring the bottom 0-3m, a gradient magnetic field is used, and the magnetic field strength gradually decreases from 0.6T to 0.4T; when pouring the middle 3-9m, a uniform magnetic field is used, with a magnetic field strength of 0.4T; when pouring the top 9-12m, an oscillating magnetic field is used, with a magnetic field strength of 0.2T-0.3T and a frequency of 3Hz.

[0024] Optionally, step S52 further includes: uniformly arranging electromagnetic plates on the outer side of the template assembly to generate a modulated magnetic field of ±10Hz; and using a magnetostrictive vibrator with a working frequency of 145-155Hz for vibration during the pouring process.

[0025] Optionally, the template assembly includes multiple metal templates and multiple template connectors; the multiple metal templates together form the main body shape, and the connected metal templates are connected by template connectors.

[0026] Optionally, step S5 may be followed by:

[0027] S6. Remove the formwork components after the independent column is formed.

[0028] Step S6 includes:

[0029] S61. After removing the template connectors, impact the back of the template with a vibrator at a vibration acceleration of 5g.

[0030] S62. The outer wall of the metal template is adsorbed by a vacuum suction cup, and the metal template is smoothly removed from the surface of the column with the help of hoisting equipment.

[0031] Optionally, a circular hole is provided in the non-critical stress area of ​​the metal template, and an insulating sleeve is embedded in the circular hole.

[0032] Optionally, the stabilizing components include multiple tie rods and ropes; the tie rods are positioned between the stair treads of the ladder cage; the exterior of the ladder cage is connected to the ground via ropes.

[0033] (III) Beneficial Effects

[0034] The beneficial effects of this invention are:

[0035] This invention provides a construction method for tall, independent columns in heavy industrial multi-story factory buildings. It utilizes prefabricated formwork cages instead of traditional scaffolding, reducing the consumption of reusable materials such as steel pipes and fasteners, and minimizing the labor input required for repeated erection and dismantling. Furthermore, the steel formwork can be reused multiple times, significantly reducing material and labor costs. The process eliminates the cumbersome steps of phased scaffolding erection and column anchoring, reducing waste from overlapping operations and indirectly lowering management costs. The prefabricated formwork cages can be quickly installed without phased erection, meeting the immediate needs of personnel access. The standardized design of the steel formwork allows for rapid assembly and mold closing, combined with segmented pouring processes, avoiding the waiting time associated with traditional scaffolding and pouring procedures. After the column is formed, the steel formwork and formwork cages can be dismantled and moved to the next column within 12-24 hours, enabling continuous operation and significantly improving overall construction efficiency compared to traditional methods. The prefabricated ladder cage features a standardized structure with built-in stabilizing components, avoiding the collapse risk caused by improper erection of traditional scaffolding. The ladder cage and column working areas are relatively independent, reducing the difficulty of transporting materials at heights and lowering the risk of falls. The high rigidity of the steel formwork prevents deformation during pouring, reducing safety accidents caused by formwork instability. Real-time monitoring of the verticality of the column formwork components using guy ropes and tilt sensors ensures that the verticality deviation of the independent columns is controlled within the design limits. When tying the steel mesh in layers, the ladder cage provides a stable working platform, reducing problems such as rebar misalignment and stirrup spacing deviations, ensuring uniform stress distribution on the independent columns. The smooth surface of the steel formwork results in high-quality column formation after pouring, reducing defects such as honeycomb and pitting. Addressing the "high load, high density" characteristics of heavy industrial multi-story buildings, this method, through foundation reinforcement, high-precision formwork control, and high-quality concrete pouring, ensures that the independent columns possess sufficient load-bearing capacity and stability, meeting the stringent requirements of high-rise industrial buildings for their core load-bearing structures, and providing reliable technical support for the implementation of heavy industrial multi-story building models. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall process of a construction method for tall independent columns in a heavy industrial multi-story factory building according to Embodiment 1 of the present invention;

[0037] Figure 2 This is a schematic flowchart of step S1 of a construction method for tall independent columns in a heavy industrial multi-story factory building according to Embodiment 1 of the present invention.

[0038] Figure 3 This is a flowchart illustrating step S5 of a construction method for tall independent columns in a heavy industrial multi-story factory building according to Embodiment 1 of the present invention.

[0039] Figure 4 This is a flowchart illustrating step S6 of a construction method for tall independent columns in a heavy industrial multi-story factory building according to Embodiment 1 of the present invention.

[0040] Figure 5This is a flowchart illustrating step S3 of a construction method for tall independent columns in a heavy industrial multi-story factory building according to Embodiment 3 of the present invention.

[0041] Figure 6 This is a flowchart of step S5 of a construction method for tall independent columns in a heavy industrial multi-story factory building according to Embodiment 3 of the present invention. Detailed Implementation

[0042] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0043] Example 1:

[0044] like Figure 1 As shown, this embodiment provides a construction method for tall independent columns in heavy industrial multi-story factory buildings, including the following steps:

[0045] S1. Strengthen the foundation of the construction area next to the pier.

[0046] S2. Install the ladder cage on the reinforced foundation, and then install the stabilizing components for the ladder cage.

[0047] S3. Tie the steel mesh of the independent columns in layers inside the ladder cage and install the fall protection net inside the steel mesh.

[0048] S4. Install the column formwork assembly. During the installation process, the verticality of the column formwork assembly is ensured by using guy ropes and tilt sensors.

[0049] S5. Concrete is poured in sections through concrete conduits to form the independent column.

[0050] Specifically, using prefabricated ladder cages instead of traditional scaffolding reduces the consumption of reusable materials such as steel pipes and fasteners, as well as the labor input for repeated erection / dismantling. Simultaneously, the steel formwork can be reused multiple times, significantly reducing material and labor costs. In terms of procedures, it eliminates the cumbersome steps of phased scaffolding erection and column bracing, reducing waste from overlapping operations and indirectly lowering management costs. Prefabricated ladder cages can be quickly installed and positioned without phased erection, meeting the need for immediate access for work. The standardized design of the steel formwork enables rapid assembly and mold closing, combined with segmented pouring processes, avoiding the waiting time associated with traditional scaffolding and pouring procedures. After the column is formed, the steel formwork and ladder cage can be dismantled and moved to the next column within 12-24 hours, achieving a streamlined operation and significantly improving overall construction efficiency compared to traditional methods. The prefabricated ladder cage features a standardized structure with built-in stabilizing components, avoiding the collapse risk caused by improper erection of traditional scaffolding. The ladder cage and column working areas are relatively independent, reducing the difficulty of transporting materials at heights and lowering the risk of falls. The high rigidity of the steel formwork prevents deformation during pouring, reducing safety accidents caused by formwork instability. Real-time monitoring of the verticality of the column formwork components using guy ropes and tilt sensors ensures that the verticality deviation of the independent columns is controlled within the design limits. When tying the steel mesh in layers, the ladder cage provides a stable working platform, reducing problems such as rebar misalignment and stirrup spacing deviations, ensuring uniform stress distribution on the independent columns. The smooth surface of the steel formwork results in high-quality column formation after pouring, reducing defects such as honeycomb and pitting. Addressing the "high load, high density" characteristics of heavy industrial multi-story buildings, this method, through foundation reinforcement, high-precision formwork control, and high-quality concrete pouring, ensures that the independent columns possess sufficient load-bearing capacity and stability, meeting the stringent requirements of high-rise industrial buildings for their core load-bearing structures, and providing reliable technical support for the implementation of heavy industrial multi-story building models.

[0051] Furthermore, such as Figure 2 As shown, optionally, step S1 includes:

[0052] S11. Lay the bottom layer of conductive concrete.

[0053] S12. Pour the surface concrete; the thickness of the surface concrete is 100-120mm.

[0054] S13. After the surface concrete has solidified, apply an axial static magnetic field of 0.25 to 0.35 T for 20 to 24 hours.

[0055] The foundation strengthening scheme, which combines bottom conductive concrete, surface concrete, and axial static magnetic field treatment, utilizes the directional control of the internal structure of concrete by the static magnetic field to promote the dense arrangement of surface concrete particles, significantly improving the compressive strength and deformation resistance of the foundation. The surface layer thickness of 100-120mm ensures the effective depth of the magnetic field while avoiding material waste. The static magnetic field of 0.25-0.35T for 20-24 hours can achieve stable optimization of the concrete microstructure, reduce later settlement, and provide solid foundation support for tall independent columns.

[0056] Furthermore, in this embodiment, the surface concrete contains 1.2% to 1.8% iron oxide particles, which, as a magnetic field response medium, can be oriented and arranged under the action of an axial static magnetic field to form a magnetic skeleton, further enhancing the density and integrity of the surface concrete. The amount of iron oxide particles added is precisely proportioned to maximize the structural strengthening effect induced by the magnetic field without increasing the brittleness of the concrete due to excessive particles, thus balancing strength and toughness.

[0057] Furthermore, the aggregates used in the poured concrete include both magnetic and conventional aggregates; the proportion of magnetic aggregates is 28%–32%, and the proportion of conventional aggregates is 68%–72%. This dual-aggregate system of magnetic and conventional aggregates allows the magnetic aggregates to respond to magnetic field forces during subsequent magnetic field control, achieving directional distribution and dense arrangement, optimizing the internal structure of the concrete, and reducing porosity. The conventional aggregates ensure the basic strength and workability of the concrete. The synergistic ratio of the two aggregates utilizes the controllability of magnetic aggregates to improve the flexural strength of the concrete while avoiding the excessively high cost associated with using only magnetic aggregates, thus balancing performance and economy.

[0058] Furthermore, such as Figure 3 As shown, step S5 includes:

[0059] S51. An electromagnetic flow stabilizer is installed on the outside of the concrete duct; wherein the magnetic field strength generated by the electromagnetic flow stabilizer is 0.3T and the outlet flow velocity of the concrete duct is 1m / s, which can stabilize the flow state of the concrete, prevent aggregate segregation during the pouring process, and ensure the uniformity of the concrete.

[0060] S52. The height of each pouring section is 40-50cm. During the pouring process, different magnetic fields are applied in sections according to the height of the column: a gradient magnetic field is used for the bottom 0-3m, with the magnetic field strength gradually decreasing from 0.6T to 0.4T. The bottom of the column is a critical load-bearing part and needs to have high shear strength. The gradually decreasing magnetic field can guide the magnetic aggregate to migrate directionally to the outside of the column and arrange densely to form an "outer reinforced shell", which enhances the shear strength of the column bottom and effectively resists the shear force brought by the self-weight of the independent column and the upper load; a uniform magnetic field is used for the middle 3-9m, with a magnetic field strength of 0.4T. The middle part of the column mainly bears axial pressure and the uniformity of the structure must be ensured. The uniform magnetic field can make the aggregate isotropically distributed in the concrete, reduce the internal stress concentration points, and control the elastic modulus fluctuation range of the middle concrete within 5%, avoiding local cracking caused by uneven material distribution; an oscillating magnetic field is used for the top 9-12m, with a magnetic field strength of 0.2T-0.3T and a frequency of 3Hz. The top of the column is prone to pores due to air bubbles that are difficult to expel during the final pouring stage. A low-frequency oscillating magnetic field, through periodic magnetic disturbance, causes air bubbles inside the concrete to rise and escape, reducing the porosity of the top concrete. At the same time, it avoids formwork displacement caused by high-frequency vibration and ensures the compactness of the connection between the top and the beam.

[0061] In response to the characteristics of large independent columns and heavy loads in heavy industrial multi-story factory buildings, the combination of segmented magnetic field control and casting process can achieve a progressive performance of the column from bottom to top, namely gradient strengthening, uniform load bearing and dense finishing, thereby improving the overall compressive bearing capacity and meeting the stringent requirements of heavy industrial buildings for the core load-bearing structure.

[0062] Optionally, step S52 further includes: uniformly arranging electromagnetic plates on the outer side of the template assembly to generate a ±10Hz modulated magnetic field; and using a magnetostrictive vibrator with a working frequency of 145-155Hz for compaction during the pouring process. The ±10Hz modulated magnetic field generated by the electromagnetic plates on the outer side of the template forms an energy synergy with the 145-155Hz magnetostrictive vibrator. Through the superposition of the magnetic field and mechanical vibration, the efficiency of energy transfer to the interior of the concrete is enhanced, effectively eliminating the vibration blind zone in the densely reinforced area and reducing defects such as honeycomb and pitting. The matching design of the magnetic field and the vibration frequency can avoid energy cancellation and maximize the compaction effect.

[0063] Optionally, the template assembly includes multiple metal templates and multiple template connectors; the multiple metal templates are assembled to form the main shape, and the connected metal templates are connected by template connectors. Optionally, in this embodiment, steel templates are used as the metal templates. Compared with traditional wooden templates combined with square and round buckles, steel templates offer higher stability in assembly and formwork, with less bulging and a minimal risk of bursting during pouring. This effectively reduces concrete waste, and the finished column is neatly formed with minimal error and is less prone to misalignment, greatly ensuring construction quality. Furthermore, steel templates are easier to assemble than traditional wooden templates, easier to clean after disassembly, and facilitate material transportation, significantly improving construction efficiency and reducing costs. Steel templates have a high reusability rate, reducing template wear costs; the modular splicing design facilitates rapid installation and disassembly, adapting to the segmented pouring requirements of tall, independent columns and improving construction efficiency.

[0064] Optionally, such as Figure 1 As shown, step S5 is followed by:

[0065] S6. Remove the formwork components after the independent column is formed.

[0066] Step S6 includes:

[0067] S61. After removing the formwork connectors, impact the back of the formwork with a vibrator at a vibration acceleration of 5g. This high-frequency micro-vibration breaks the bond between the concrete and the formwork, reducing the resistance to demolding.

[0068] S62. The outer wall of the metal template is adsorbed by a vacuum suction cup, and the metal template is smoothly removed from the surface of the column by hoisting equipment, avoiding damage to the surface of the column or deformation of the template caused by traditional knocking demolding.

[0069] The entire demolding process not only ensures the surface flatness of the formed independent columns, but also improves the turnover efficiency of the templates and shortens the process interval.

[0070] Optionally, in this embodiment, circular holes are provided in non-critical stress areas of the metal formwork, and insulating sleeves are embedded in the holes. This reduces the shielding effect of the metal on the magnetic field, enhances the penetration ability of the external magnetic field into the concrete inside the formwork, ensures the effectiveness of magnetic field control measures in the metal formwork scenario, and guarantees the optimization effect of the magnetic field on the concrete performance.

[0071] Optionally, the stabilizing components include multiple diagonal braces and ropes. Multiple diagonal braces positioned between the stair treads of the ladder cage enhance the overall structural integrity and deformation resistance of the cage, preventing swaying during high-altitude operations. The cage is externally connected to the ground via ropes, forming multi-directional stabilizing constraints and further improving its wind load and overturning resistance. The synergistic effect of the diagonal braces and ropes significantly reduces the safety risks of high-altitude operations within the ladder cage, providing a safe and reliable working platform for processes such as rebar tying and formwork installation.

[0072] Example 2:

[0073] This embodiment provides a construction method for tall independent columns in heavy industrial multi-story factory buildings. The difference between this method and the construction method described in Embodiment 1 lies in the adaptation of the formwork components and magnetic field control, as well as the refined design of the aggregate system.

[0074] Specifically, in this embodiment, the template assembly adopts a built-in electromagnetic template, that is, electromagnetic coils distributed along the height direction are preset on the inner side of the metal template, with a spacing of 30cm between the electromagnetic coils, and the material is high-temperature resistant enameled wire. The electromagnetic coils are connected to an external control system. During pouring, the magnetic field parameters inside the template are directly adjusted through the control system without the need to penetrate the metal template, thus significantly reducing the loss of magnetic field strength. To meet the magnetic field requirements at different heights of the column (gradient magnetic field at the bottom, uniform magnetic field in the middle, and oscillating magnetic field at the top), the electromagnetic coils can be independently controlled in zones: the bottom 0-3m coil group outputs a gradient magnetic field of 0.6T→0.4T, the middle 3-9m coil group outputs a uniform magnetic field of 0.4T, and the top 9-12m coil group outputs an oscillating magnetic field of 0.2T~0.3T at 3Hz. This results in a faster magnetic field response and avoids the problem of uneven magnetic field caused by poor adhesion between the external electromagnetic plate and the template.

[0075] Specifically, in this embodiment, the aggregate used in the poured concrete adopts a system of three-stage sieved magnetic aggregate combined with conventional aggregate. The magnetic aggregate includes coarse magnetic aggregate and fine magnetic aggregate; the coarse magnetic aggregate is 5-10 mm basalt aggregate with a 300 nm thick iron oxide coating on the surface, accounting for 60%-70% of the total magnetic aggregate; the fine magnetic aggregate is 0.1-1 mm iron tailings sand, accounting for 30%-40% of the total magnetic aggregate; the conventional aggregate is 5-25 mm granite aggregate, still accounting for 68%-72%, and the total proportion of magnetic aggregate is 28%-32%. Under the action of a magnetic field, the coarse magnetic aggregate preferentially forms a skeleton structure, while the fine magnetic aggregate fills the gaps in the skeleton, and the two work together to reduce the internal porosity of the concrete. When the bottom gradient magnetic field is applied, the coarse aggregate oriented and aggregates outward to form a reinforcing layer, while the fine aggregate fills the inner gaps, making the density distribution of the column bottom section more reasonable; in the top oscillating magnetic field, the fine aggregate oscillates with the magnetic field and is more likely to expel air bubbles, further improving the compactness.

[0076] Specifically, in this embodiment, the vibrator is a dual-frequency adjustable magnetostrictive vibrator. At the bottom of the column (0-3m), a 155Hz high-frequency vibration is used to cooperate with the coarse aggregate skeleton forming; in the middle (3-9m), a 145Hz medium-frequency vibration is used to avoid excessive disturbance to the uniformly distributed aggregate; at the top (9-12m), a composite vibration mode with 145Hz and 3Hz oscillating magnetic fields synchronized is used to accelerate the rise of air bubbles through the resonance effect of mechanical vibration and magnetic field oscillation.

[0077] In this embodiment, the built-in electromagnetic template reduces magnetic field loss, graded magnetic aggregate optimizes structural filling, and the appropriate dual-frequency vibration further improves the precision of magnetic field control and the density of concrete. After the column is formed, the shear resistance at the bottom, the axial bearing capacity in the middle, and the density of the top nodes are further improved. It is especially suitable for the construction of independent columns in heavy industrial multi-story buildings with a height exceeding 15m and a larger load. Moreover, the integrated design of the template and magnetic field system reduces the complexity of on-site equipment layout and further improves construction efficiency.

[0078] Example 3:

[0079] This embodiment provides another construction method for tall independent columns in heavy industrial multi-story factory buildings. Based on the construction method provided in Embodiment 1, it adds steps such as pre-reinforcement with steel mesh, dynamic calibration of magnetic field parameters, and magnetic field coordination during the curing stage, further optimizing construction quality and structural performance.

[0080] Specifically, such as Figure 5 As shown, step S3 includes:

[0081] S31. The steel mesh is tied in layers, and a ring magnetic positioning hoop is fitted on the outside of each section of steel mesh. The spacing of the positioning hoop is 40-50cm, which is consistent with the height of the column segment pouring.

[0082] S32. Apply a 0.1T annular magnetic field to the positioning hoop using a temporary electromagnet, causing the positioning hoop to adhere to the outside of the reinforcing mesh, correcting the verticality and roundness of the reinforcing mesh, and maintaining this state before the metal formwork is installed to prevent the reinforcing mesh from deforming due to lateral pressure during the pouring process.

[0083] Specifically, such as Figure 6 As shown, step S5 further includes:

[0084] S53. After the concrete is poured in sections, remove the guide pipes and vibration equipment, but keep the electromagnetic plate on the outside of the formwork energized and enter the curing stage.

[0085] S54. During the first 72 hours of curing, a constant uniform magnetic field of 0.1T is applied to the column to promote cement hydration reaction and reduce early shrinkage cracks.

[0086] S55. After curing for 72 hours, gradually reduce the magnetic field strength to 0.05T and continue until demolding (12-24 hours). Combine this with water curing to further improve the strength development speed and integrity of the concrete.

[0087] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0088] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0089] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0090] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0091] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A construction method for tall, independent columns in heavy industrial multi-story factory buildings, characterized in that, Including the following steps: S1. Strengthen the foundation of the construction area next to the pier; S2. Install the ladder cage on the reinforced foundation, and then install the stabilizing components for the ladder cage. S3. Tie the steel mesh of the independent columns in layers inside the ladder cage and install the fall protection net inside the steel mesh; S4. Install the column formwork assembly. During the installation process, the verticality of the column formwork assembly is ensured by using guy ropes and tilt sensors. S5. Concrete is poured in sections through concrete conduits to form the independent column.

2. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 1, characterized in that, Step S1 includes: S11. Lay the bottom layer of conductive concrete; S12. Pour the surface concrete; the thickness of the surface concrete is 100-120mm; S13. After the surface concrete has solidified, apply an axial static magnetic field of 0.25 to 0.35 T for 20 to 24 hours.

3. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 2, characterized in that, The surface concrete contains 1.2% to 1.8% iron oxide particles.

4. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 1, characterized in that, The aggregates used in the poured concrete include magnetic aggregates and conventional aggregates; Magnetic aggregates account for 28%–32%, while conventional aggregates account for 68%–72%.

5. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 1, characterized in that, Step S5 includes: S51. An electromagnetic current stabilizer is installed on the outside of the concrete duct; wherein the magnetic field strength generated by the electromagnetic current stabilizer is 0.3T and the outlet flow velocity of the concrete duct is 1m / s. S52. The height of each pouring section is 40-50cm. During the pouring process, different magnetic fields are applied in sections according to the height of the independent column: when pouring the bottom 0-3m, a gradient magnetic field is used, and the magnetic field strength gradually decreases from 0.6T to 0.4T; when pouring the middle 3-9m, a uniform magnetic field is used, with a magnetic field strength of 0.4T; when pouring the top 9-12m, an oscillating magnetic field is used, with a magnetic field strength of 0.2T-0.3T and a frequency of 3Hz.

6. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 5, characterized in that, Step S52 also includes: Electromagnetic plates are evenly arranged on the outside of the template assembly to generate a modulated magnetic field of ±10Hz; during the pouring process, a magnetostrictive vibrator with a working frequency of 145~155Hz is used for vibration.

7. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 1, characterized in that, The template assembly includes multiple metal templates and multiple template connectors; Multiple metal templates are combined to form the main shape, and the connected metal templates are connected by template connectors.

8. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 7, characterized in that, Step S5 is followed by: S6. Remove the formwork components after the independent column is formed; Step S6 includes: S61. After removing the template connectors, impact the back of the template with a vibrator; S62. The outer wall of the metal template is adsorbed by a vacuum suction cup, and the metal template is smoothly removed from the surface of the column with the help of hoisting equipment.

9. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 7, characterized in that, The non-critical stress areas on the metal template have circular holes, and insulating sleeves are embedded in the circular holes.

10. The construction method for tall independent columns in heavy industrial multi-story factory buildings as described in claim 1, characterized in that, The stabilizing components include multiple tie rods and ropes; Multiple diagonal braces are installed between the stair treads of the ladder cage; the outside of the ladder cage is connected to the ground by ropes.

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